C#中保存和装载配置文件（ini）的类及使用示例代码

 

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Xml;
using System.IO;
using System.Windows.Forms;

namespace VPNClient
{
    public class Settings
    {
        XmlDocument doc;
        string fileName;
        string rootName;

        public Settings(string fileName, string rootName)
        {
            this.fileName = fileName;
            this.rootName = rootName;

            doc = new XmlDocument();

            try
            {
                doc.Load(fileName);
            }
            catch (System.IO.FileNotFoundException)
            {
                CreateSettingsDocument();
            }
        }

        public Settings(string fileName)
            : this(fileName, "Settings")
        {
        }

        //Deletes all entries of a section
        public void ClearSection(string section)
        {
            XmlNode root = doc.DocumentElement;
            XmlNode s = root.SelectSingleNode('/' + rootName + '/' + section);

            if (s == null)
                return;  //not found

            s.RemoveAll();
        }

        //initializes a new settings file with the XML version
        //and the root node
        protected void CreateSettingsDocument()
        {
            doc.AppendChild(doc.CreateXmlDeclaration("1.0", null, null));
            doc.AppendChild(doc.CreateElement(rootName));
        }

        public void Flush()
        {
            try
            {
                doc.Save(fileName);
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }

        //removes a section and all its entries
        public void RemoveSection(string section)
        {
            XmlNode root = doc.DocumentElement;
            XmlNode s = root.SelectSingleNode('/' + rootName + '/' + section);

            if (s != null)
                root.RemoveChild(s);
        }

        public void Save()
        {
            Flush();
        }

        #region Read methods

        public bool ReadBool(string section, string name, bool defaultValue)
        {
            string s = ReadString(section, name, "");

            if (s == Boolean.TrueString)
                return true;
            else if (s == Boolean.FalseString)
                return false;
            else
                return defaultValue;
        }

        public DateTime ReadDateTime(string section, string name, DateTime defaultValue)
        {
            string s = ReadString(section, name, "");

            if (s == "")
                return defaultValue;
            else
            {
                try
                {
                    DateTime dt = Convert.ToDateTime(s);
                    return dt;
                }
                catch (FormatException)
                {
                    return defaultValue;
                }
            }
        }

        public double ReadDouble(string section, string name, double defaultValue)
        {
            string s = ReadString(section, name, "");

            if (s == "")
                return defaultValue;
            else
            {
                try
                {
                    double d = Convert.ToDouble(s);
                    return d;
                }
                catch (FormatException)
                {
                    return defaultValue;
                }
            }
        }

        public float ReadFloat(string section, string name, float defaultValue)
        {
            string s = ReadString(section, name, "");

            if (s == "")
                return defaultValue;
            else
            {
                try
                {
                    float f = Convert.ToSingle(s);
                    return f;
                }
                catch (FormatException)
                {
                    return defaultValue;
                }
            }
        }

        public int ReadInt(string section, string name, int defaultValue)
        {
            string s = ReadString(section, name, "");

            if (s == "")
                return defaultValue;
            else
            {
                try
                {
                    int n = Convert.ToInt32(s);
                    return n;
                }
                catch (FormatException)
                {
                    return defaultValue;
                }
            }
        }

        public long ReadLong(string section, string name, long defaultValue)
        {
            string s = ReadString(section, name, "");

            if (s == "")
                return defaultValue;
            else
            {
                try
                {
                    long l = Convert.ToInt64(s);
                    return l;
                }
                catch (FormatException)
                {
                    return defaultValue;
                }
            }
        }

        public short ReadShort(string section, string name, short defaultValue)
        {
            string s = ReadString(section, name, "");

            if (s == "")
                return defaultValue;
            else
            {
                try
                {
                    short n = Convert.ToInt16(s);
                    return n;
                }
                catch (FormatException)
                {
                    return defaultValue;
                }
            }
        }

        public string ReadString(string section, string name, string defaultValue)
        {
            XmlNode root = doc.DocumentElement;
            XmlNode s = root.SelectSingleNode('/' + rootName + '/' + section);

            if (s == null)
                return defaultValue;  //not found

            XmlNode n = s.SelectSingleNode(name);

            if (n == null)
                return defaultValue;  //not found

            XmlAttributeCollection attrs = n.Attributes;

            foreach (XmlAttribute attr in attrs)
            {
                if (attr.Name == "value")
                    return attr.Value;
            }

            return defaultValue;
        }

        public uint ReadUInt(string section, string name, uint defaultValue)
        {
            string s = ReadString(section, name, "");

            if (s == "")
                return defaultValue;
            else
            {
                try
                {
                    uint n = Convert.ToUInt32(s);
                    return n;
                }
                catch (FormatException)
                {
                    return defaultValue;
                }
            }
        }

        public ulong ReadULong(string section, string name, ulong defaultValue)
        {
            string s = ReadString(section, name, "");

            if (s == "")
                return defaultValue;
            else
            {
                try
                {
                    ulong l = Convert.ToUInt64(s);
                    return l;
                }
                catch (FormatException)
                {
                    return defaultValue;
                }
            }
        }

        public ushort ReadUShort(string section, string name, ushort defaultValue)
        {
            string s = ReadString(section, name, "");

            if (s == "")
                return defaultValue;
            else
            {
                try
                {
                    ushort n = Convert.ToUInt16(s);
                    return n;
                }
                catch (FormatException)
                {
                    return defaultValue;
                }
            }
        }

        #endregion

        #region Write methods

        public void WriteBool(string section, string name, bool value)
        {
            WriteString(section, name, value.ToString());
        }

        public void WriteDateTime(string section, string name, DateTime value)
        {
            WriteString(section, name, value.ToString());
        }

        public void WriteDouble(string section, string name, double value)
        {
            WriteString(section, name, value.ToString());
        }

        public void WriteFloat(string section, string name, float value)
        {
            WriteString(section, name, value.ToString());
        }

        public void WriteInt(string section, string name, int value)
        {
            WriteString(section, name, value.ToString());
        }

        public void WriteLong(string section, string name, long value)
        {
            WriteString(section, name, value.ToString());
        }

        public void WriteShort(string section, string name, short value)
        {
            WriteString(section, name, value.ToString());
        }

        public void WriteString(string section, string name, string value)
        {
            XmlNode root = doc.DocumentElement;
            XmlNode s = root.SelectSingleNode('/' + rootName + '/' + section);

            if (s == null)
                s = root.AppendChild(doc.CreateElement(section));

            XmlNode n = s.SelectSingleNode(name);

            if (n == null)
                n = s.AppendChild(doc.CreateElement(name));

            XmlAttribute attr = ((XmlElement)n).SetAttributeNode("value", "");
            attr.Value = value;
        }

        public void WriteUInt(string section, string name, uint value)
        {
            WriteString(section, name, value.ToString());
        }

        public void WriteULong(string section, string name, ulong value)
        {
            WriteString(section, name, value.ToString());
        }

        public void WriteUShort(string section, string name, ushort value)
        {
            WriteString(section, name, value.ToString());
        }

        #endregion

    }
}

使用示例代码

private void LoadSettings(){
            Settings s = new Settings("config.xml");
            bPasswdRemeber = s.ReadBool("Data1", "RemeberPassword", false);
            bDefaultGw = s.ReadBool("Data1", "UseDefaultGateway", false);
            username = s.ReadString("Data1", "Username", "");
            password = s.ReadString("Data1","Password","");
            this.txtUsername.Text = username;
            this.txtPassword.Text = password;
            this.cbxDefaultGW.Checked = bDefaultGw;
            this.cbxPassword.Checked = bPasswdRemeber;
        }

        private void WriteSettings(){
            username = this.txtUsername.Text.Trim();
            password = this.txtPassword.Text.Trim();
            bDefaultGw = this.cbxDefaultGW.Checked;
            bPasswdRemeber = this.cbxPassword.Checked;

            Settings s = new Settings("config.xml");
            s.WriteBool("Data1", "RemeberPassword", bPasswdRemeber);
            s.WriteBool("Data1", "UseDefaultGateway", bDefaultGw);
            if(bPasswdRemeber){
                s.WriteString("Data1", "Username", username);
                s.WriteString("Data1", "Password", password);
            }else{
                s.WriteString("Data1", "Username", "");
                s.WriteString("Data1", "Password", "");
            }
            s.Save();
        }

生成的config.xml数据文件

<?xml version="1.0"?>
<Settings>
  <Data1>
    <RemeberPassword value="True" />
    <UseDefaultGateway value="False" />
    <Username value="jimshen" />
    <Password value=jimshen!#$%%^ />
  </Data1>
</Settings>